21 



I have tried to follow as rigidly as possible the Paris Code, the 

 Eochester Rules of the Botanical Club of the A. A. A. 8., and 

 the amendments male thereto at the Madison meeting, although 

 I wish to record my strongest protest against one of the latter, as 

 it introduces some most inelegant nomenclature. In work of this 

 kind the one indispensible book is, of course. Dr. Kuntze's 

 Revisio Generum Plantarum. This book, also, has caused the 

 most changes in (or rather restorations of) generic names. 

 Many corrections of the nomenclature of generic names have 

 been made from the writings of Professor Greene and Dr. Brit- 

 ton; one [Leptoglottis for Sohrankia) I have made myself. 

 The sources from which I have derived corrections of specific 

 names are too diverse to be' mentioned here. The two books 

 most often referred to and from which, perhaps, I have had the. 

 most help are Watson's Index and MacMillan's Metaspermae. 

 At the same time I have fotind Professor Greene correct in stat- 

 ing that the former is not exact, and that the latter will be useful 

 to " those who know how to use " it. 



As a basis I have taken the sixth edition of Gray's Manual, 

 as it is most commonly used and -latest published manual, and 

 have changed those names which do not conform to recent views. 

 Those not changed may be regarded as in accordance with them 

 except as to the citation of authors. In the case of our western 

 species not given in Gray's Manual, the corrections are made 

 from Coulter's Manual of the Rocky Mountain Region. In cases 

 where the two books disagree and no correction is made, the 

 name in Gray's Manual should be regarded as the correct one. 

 Thus, Coulter has Anemone decapetala* and the genus Vesicaria. 

 Gray has Anemone caroliniana and Lesquerella. The latter 

 two should be used. 



My list contains 130 names, which is about thirty per cent 

 of the reported Polypetalae of the state. Not all of these 

 changes, however, are due to the requirements of correct nomen- 



*The true A. decapetala may be found in the southern part or the Rocky Mountain region, 

 but not in Nebraslta. Coulter's A. decapetala may include both. 



